Search found 5101 matches

by Jirka
Sat Jan 16, 2021 1:55 am
Forum: HYDRUS (2D/3D)
Topic: Re- FAQ 11: Running Computational Modules in a Batch
Replies: 3
Views: 8

Re: Re- FAQ 11: Running Computational Modules in a Batch

This is not an issue of HYDRUS anymore. HYDRUS cares only about the working folder and the level_01.dir file with the path to the working folder. The error you get indicates that HYDRUS cannot find one or the other. J.
by Jirka
Fri Jan 15, 2021 10:11 pm
Forum: HYDRUS (2D/3D)
Topic: Re- FAQ 11: Running Computational Modules in a Batch
Replies: 3
Views: 8

Re: Re- FAQ 11: Running Computational Modules in a Batch

Start according to FAQ 4, i.e., with a single project, before running projects in a batch. Test it first at a desktop, before moving to a network, etc. J.
by Jirka
Fri Jan 15, 2021 8:09 pm
Forum: Hydrus 1D
Topic: Triggered irrigation for bare soil
Replies: 5
Views: 44

Re: Triggered irrigation for bare soil

Obviously, make a back up first so that you can return to the original file if needed. J.
by Jirka
Thu Jan 14, 2021 11:04 pm
Forum: Hydrus 1D
Topic: Request for guidance regarding the interception term in Hydrus1D
Replies: 1
Views: 4

Re: Request for guidance regarding the interception term in Hydrus1D

Interception and snow cannot be used simultaneously, only one or the other. J.
by Jirka
Thu Jan 14, 2021 9:55 pm
Forum: Hydrus 1D
Topic: Negative solute flux within sensitivity analysis
Replies: 4
Views: 53

Re: Negative solute flux within sensitivity analysis

I think you should try to understand when the water/solute fluxes are negative and when positive, and what different solute BCs actually do. It is all explained in the manual. J.
by Jirka
Thu Jan 14, 2021 9:26 pm
Forum: Hydrus 1D
Topic: Triggered irrigation for bare soil
Replies: 5
Views: 44

Re: Triggered irrigation for bare soil

Perhaps, I should have posted the 32 bit version of the file. J.
by Jirka
Wed Jan 13, 2021 9:34 pm
Forum: Hydrus 1D
Topic: Triggered irrigation for bare soil
Replies: 5
Views: 44

Re: Triggered irrigation for bare soil

I must have already fixed that in my latest files since I do not see this behavior. Replace the attached file (note that this is 64-bit exe). J.
by Jirka
Tue Jan 12, 2021 7:07 pm
Forum: Hydrus 1D
Topic: Negative solute flux within sensitivity analysis
Replies: 4
Views: 53

Re: Negative solute flux within sensitivity analysis

You need to make sure that your boundary conditions are physical meaningful. The constant head BC (position of GWT) allows for flow in both direction (downward recharge or upward discharge) depending on the development of the pressure head profile (and atmospheric BC at the top). The zero-concentrat...
by Jirka
Fri Jan 08, 2021 5:39 pm
Forum: Hydrus 1D
Topic: sorbed concentration on soil
Replies: 6
Views: 4343

Re: sorbed concentration on soil

You should be able to figure this out yourself based on the information that I provided in my previous answer. J.
by Jirka
Thu Jan 07, 2021 10:25 pm
Forum: Hydrus 1D
Topic: Request for guidance regarding root distribution function
Replies: 2
Views: 47

Re: Request for guidance regarding root distribution function

HYDRUS automatically normalized whatever is entered. J.
by Jirka
Thu Jan 07, 2021 5:32 pm
Forum: Hydrus 1D
Topic: sorbed concentration on soil
Replies: 6
Views: 4343

Re: sorbed concentration on soil

To limit the size of output files, I try not to print things that can be easily calculated from existing output. Indeed, the sorbed concentration can be easily calculated using the adsorption isotherm, e.g., s=Kd*c. Note that s is in units of [Mass_contaminant/Mass_soil] and thus to get the mass for...
by Jirka
Wed Jan 06, 2021 9:23 pm
Forum: Hydrus 1D
Topic: Now sure how to update a model parameter and the print time value
Replies: 4
Views: 54

Re: Now sure how to update a model parameter and the print time value

You can download an older version of the source code at the HYDRUS website and recompile it with new dimensions. J.
by Jirka
Tue Jan 05, 2021 8:44 pm
Forum: Hydrus 1D
Topic: Now sure how to update a model parameter and the print time value
Replies: 4
Views: 54

Re: Now sure how to update a model parameter and the print time value

You can get different air-entry values if you use the modified van Genuchten model and manipulate the Theta_m (>Theta_s) parameter. The GUI allows only 250 print times. The computational module is dimensioned for 100 print times. If you want to have more than 250, but less than 1000, print times, yo...
by Jirka
Tue Jan 05, 2021 8:55 am
Forum: Hydrus 1D
Topic: Boundary condition
Replies: 1
Views: 42

Re: Boundary condition

As long as you do not expect ponding of the soil surface, both BCs should work the same. If you do, then you should use the atmospheric BC, which can deal with such conditions. J.
by Jirka
Wed Dec 30, 2020 12:22 am
Forum: HYDRUS (2D/3D)
Topic: Set initial condition spatially in FE mesh
Replies: 5
Views: 98

Re: Set initial condition spatially in FE mesh

I do not have anything to add to my previous answer. J.